WO2020093518A1 - Circuit de commande de pixels, structure de pixels et appareil d'affichage - Google Patents

Circuit de commande de pixels, structure de pixels et appareil d'affichage Download PDF

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Publication number
WO2020093518A1
WO2020093518A1 PCT/CN2018/120816 CN2018120816W WO2020093518A1 WO 2020093518 A1 WO2020093518 A1 WO 2020093518A1 CN 2018120816 W CN2018120816 W CN 2018120816W WO 2020093518 A1 WO2020093518 A1 WO 2020093518A1
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WIPO (PCT)
Prior art keywords
pixel
electrode
switch tube
line
driving circuit
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PCT/CN2018/120816
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English (en)
Chinese (zh)
Inventor
单剑锋
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惠科股份有限公司
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Publication of WO2020093518A1 publication Critical patent/WO2020093518A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals

Definitions

  • the present application relates to the field of display technology, in particular to a pixel driving circuit, a pixel structure and a display device.
  • TFT-LCD Thin Film Transistor Liquid Crystal Display
  • LCD Thin Film Transistor Liquid Crystal Display
  • display panel drive methods include: normal (system) drive, tri-gate (three-dimensional crystal) drive, etc., of which tri-gate drive can use
  • the tri-gate drive has been extremely widely used in the display panel.
  • An object of the present application is to provide a pixel driving circuit, a pixel structure and a display device, including but not limited to solving: serious color shift phenomenon occurs on the display panel, the large viewing angle display effect of the display panel screen is poor, and the pixel aperture Low, the problem of poor user viewing experience.
  • a pixel driving circuit which includes:
  • pixels distributed in an array are defined by the intersection of scan lines and data lines;
  • each pixel includes a first pixel area and a second pixel area adjacent to each other in the horizontal direction;
  • the first pixel area includes: a first switch tube and a first pixel electrode, and the first pixel electrode is connected to the data line and the scan line through the first switch tube;
  • the second pixel area includes: a second switch tube, a third switch tube, and a second pixel electrode, the second pixel electrode is connected to the data line and the scan line through a second switch tube, and the third switch The first conducting electrode of the tube is connected to the second pixel electrode, the control electrode of the third switching tube is connected to the scan line, and the second conducting electrode of the third switching tube is connected to the common electrode line;
  • the third switch When the third switch is turned on, the charge in the second pixel electrode is output to the common electrode line through the third switch.
  • the pixels are any one of red pixels, green pixels, and blue pixels.
  • all pixels in the same row have the same color.
  • two pixels adjacent in the vertical direction have different colors.
  • the first conductive electrode of the first switch tube is connected to the first pixel electrode, and the second conductive electrode of the first switch tube is connected to the A data line, the control pole of the first switch tube is connected to the scan line;
  • the first conductive electrode of the second switch tube is connected to the second pixel electrode, the second conductive electrode of the second switch tube is connected to the data line, and the first The control pole of the second switch tube is connected to the scan line, and the control pole of the third switch tube is connected to the scan line.
  • the first switch tube and the second switch tube are connected to the same scan line, and the first switch tube and the second switch tube are connected to the same data line.
  • the first switch tube and the first switch tube of the previous pixel and the first switch tube and the second switch tube of the latter pixel are connected to the same data line.
  • the second switch tube and the third switch tube are connected to different scan lines.
  • the first scan line and the second scan line have opposite power supply polarities
  • the first scan line is connected to the second switch tube, and the second scan line is connected to the third switch tube.
  • control electrode of the third switching transistor of the previous pixel and the control electrode of the third switching transistor of the following pixel are respectively connected to different scan lines.
  • the first pixel area and the second pixel area have the same area.
  • the pixels are designed with N domains, where N is a positive integer greater than or equal to 1.
  • any two pixels have the same number of domains.
  • the first pixel area and the second pixel area have the same number of domain areas.
  • the third switching tube in the previous pixel is connected to the same scanning line as the first switching tube and the second switching tube in the following pixel.
  • the first pixel electrode and the second pixel electrode have different potentials.
  • two data lines adjacent in the horizontal direction have opposite power supply polarities.
  • Another object of this application is to provide a pixel structure, which includes:
  • the pixel driving circuit includes:
  • pixels distributed in an array are defined by the intersection of scan lines and data lines;
  • each pixel includes a first pixel area and a second pixel area adjacent to each other in the horizontal direction;
  • the first pixel area includes: a first switch tube and a first pixel electrode, and the first pixel electrode is connected to the data line and the scan line through the first switch tube;
  • the second pixel area includes: a second switch tube, a third switch tube, and a second pixel electrode, the second pixel electrode is connected to the data line and the scan line through a second switch tube, and the third switch The first conducting electrode of the tube is connected to the second pixel electrode, the control electrode of the third switching tube is connected to the scan line, and the second conducting electrode of the third switching tube is connected to the common electrode line;
  • the plurality of pixels are arranged on the array substrate and distributed in an array on the array substrate, and the common electrode line is arranged opposite to the array substrate;
  • the second conducting electrode of the third switch tube is electrically connected to the common electrode line through an opening in the array substrate.
  • Still another object of the present application is to provide a display device, which includes a pixel structure and a display panel, and the pixel structure is electrically connected to the display panel;
  • the pixel structure includes:
  • the pixel driving circuit includes:
  • pixels distributed in an array are defined by the intersection of scan lines and data lines;
  • each pixel includes a first pixel area and a second pixel area adjacent to each other in the horizontal direction;
  • the first pixel area includes: a first switch tube and a first pixel electrode, and the first pixel electrode is connected to the data line and the scan line through the first switch tube;
  • the second pixel area includes: a second switch tube, a third switch tube, and a second pixel electrode, the second pixel electrode is connected to the data line and the scan line through a second switch tube, and the third switch The first conducting electrode of the tube is connected to the second pixel electrode, the control electrode of the third switching tube is connected to the scan line, and the second conducting electrode of the third switching tube is connected to the common electrode line;
  • the plurality of pixels are arranged on the array substrate and distributed in an array on the array substrate, and the common electrode line is arranged opposite to the array substrate;
  • the second conducting electrode of the third switch tube is electrically connected to the common electrode line through an opening in the array substrate.
  • the pixel driving circuit provided by the embodiment of the present application divides the pixel into a first pixel area and a second pixel area, and controls the on or off state of the second switch tube in the second pixel area to make the second pixel area
  • the electric charge in the second pixel electrode in the image is transferred to the common electrode line to adjust the voltage difference between different pixel areas in the pixel
  • the large viewing angle display in the panel is better; at the same time, the number of driving signals in the pixel is reduced, the aperture ratio of the pixel is improved, and the user experience is enhanced; multiple pixels in the display panel can always be in a stable working state, the display panel can Presenting a clearer and complete picture improves the practical value of the pixel driving circuit.
  • FIG. 1 is a schematic structural diagram of a pixel driving circuit provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a pixel provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of another pixel provided by an embodiment of the present application.
  • FIG. 4 is a structural diagram of a pixel structure provided by an embodiment of the present application.
  • FIG. 5 is a structural diagram of a display device provided by an embodiment of the present application.
  • the display panel is developing towards a wide screen and large size, then the pixel driving circuit in the display panel has a more complicated circuit structure and control principle, and the display panel in the exemplary technology may have serious color shift problems And the problem of low aperture ratio; the color shift problem refers to: the hue and saturation of the color of the screen in the display panel are obviously different from the real image of the outside world.
  • the aperture ratio problem refers to: after removing the wiring part and the switch tube in the pixel, the pixel area of the portion where the light passes and the overall area of each pixel Generally, the higher the aperture ratio of the pixel, the higher the efficiency of light passing through the pixel, and the screen of the display panel can display more accurate grayscale; the pixel driving circuit provided by the embodiment of the present application can solve the color of the display panel Partial problems and increase the aperture ratio of pixels.
  • FIG. 1 shows a schematic structural diagram of a pixel driving circuit 10 provided by an embodiment of the present application. For ease of explanation, only parts related to the embodiment of the present application are shown. As shown in FIG. 1, the pixel driving circuit 10 includes a common electrode line Acom and multiple pixels 101.
  • the common electrode line Acom there is a common voltage on the common electrode line Acom, through which the pixel 101 can be in a stable working state; for example, since the common voltage on the common electrode line Acom and the pixel voltage in the pixel 101 have a voltage difference, By adjusting the voltage difference, the brightness and color gradation in the display panel can be changed, and the display panel can display a dynamic and complete picture.
  • a plurality of pixels 101 distributed in an array the pixels 101 are defined by the intersection of the scanning line G and the data line D.
  • the pixel 101 is any one of a red pixel, a green pixel, and a blue pixel, and the display panel can combine multiple pixels 101 to form images with different color levels.
  • the pixel 101 is connected to a scanning line G and a data line D.
  • a scanning signal exists on the scanning line G.
  • the scanning signal can control the on and off states of the pixel 101.
  • a data signal exists on the data line D.
  • the data signal can realize the charging process of the pixel 101; for example, if the pixel 101 is turned on by the scan signal, the pixel 101 is connected to the data signal to realize its own charging operation, and the voltage in the pixel 101 will rise accordingly to drive
  • the display panel can present light sources of different colors; therefore, the pixel driving circuit 10 has a relatively simplified circuit structure and its control method.
  • all the pixels 101 in the same row have the same color; the control performance of the screen display effect in the display panel is stronger.
  • two adjacent pixels in the vertical direction have different colors; furthermore, different pixels in the pixel driving circuit can be driven by corresponding scanning through the scan signal and the data signal, when the vertical direction
  • the display panel can present light sources with different colors and brightness, which improves the color diversity of the picture in the display panel, so that the display panel has a better viewing angle and better display effect.
  • Each pixel 101 includes a first pixel area 201 and a second pixel area 202 that are adjacently arranged in the horizontal direction; as shown in FIG. 2, FIG. 2 shows the structure of each pixel 101 provided by an embodiment of the present application Schematically, in each pixel 101, the first pixel area 201 and the second pixel area 202 respectively have corresponding voltages. By adjusting the potential of the first pixel area 201 and the potential of the second pixel area 202, the pixel 101 can be placed in the corresponding In the working state, the display panel combines multiple pixels 101 to cooperate with each other to present pictures of different colors.
  • the first pixel area 201 includes: a first switch tube 204 and a first pixel electrode 203, and the first pixel electrode 203 is connected to the data line D and the data line through the first switch tube 204 Scan line G.
  • the second pixel area 202 includes: a second switch tube 205, a third switch tube 206, and a second pixel electrode 207.
  • the second pixel electrode 207 is connected to the data line D and the scan line through the second switch tube 205 G
  • the first conductive electrode of the third switch 206 is connected to the second pixel electrode 207
  • the control electrode of the third switch 206 is connected to the scan line G
  • the second conductive electrode of the third switch 206 is connected to the common electrode line Acom.
  • the third switch 206 When the third switch 206 is turned on, the charge in the second pixel electrode 207 is output to the common electrode line Acom through the third switch 206.
  • the scan signal on the scan line G and the data signal on the data line D can control the on or off of the first switching tube 204, when the first switching tube 204 is on
  • the first pixel electrode 203 can be charged through the data signal to change the potential in the first pixel electrode 203; at the same time, the scan signal and the data signal can be combined to control the second switch 205 on or off, when the second
  • the switch tube 205 is turned on
  • the data line D outputs the data signal to the second pixel electrode 207 through the second switch tube 205 to realize the charging process of the second pixel electrode 207; therefore, the embodiment of the present application combines the first switch tube 204 and The turning on or off of the second switch tube 205 can realize the charging function of each pixel electrode in the pixel 101 to ensure that the pixel 101 can realize the video driving function.
  • the first pixel electrode 203 and the second pixel electrode 207 have corresponding potentials due to charging, and there is a large difference between the potential of the first pixel electrode 203 and the second pixel electrode 207. If the voltage difference between the first pixel electrode 203 and the second pixel electrode 207 is adjusted, the working state of the pixel 101 can be changed, and the display panel can present different pictures and colors; therefore, the embodiment of the present application uses the third switch tube 206 to The electric charge in the second pixel electrode 207 is discharged to adjust the electric potential of the second pixel electrode 207, change the display state of the screen in the display panel, and improve the large viewing angle display effect of the screen in the display panel.
  • the pixel 101 is divided into two pixel areas (the first pixel area 201 and the second pixel area 202), and three switch tubes (the first switch tube 204, the second switch tube 205, and the third Switch tube 206) to control the working state of the two pixel areas, the circuit structure is simple; as shown in FIG.
  • the embodiment of the present application uses a 3T design (3 switch tubes) in the pixel drive circuit, and can pass the third switch
  • the tube 206 can discharge the charge in the second pixel electrode 207 to adjust the voltage difference between the first pixel area 201 and the second pixel area 202, reducing the color shift of the display panel under a large viewing angle display; embodiments of the present application There is no need to use additional driving traces to discharge the charge in the pixel electrodes, which simplifies the circuit structure of the pixel driving circuit 10 in the display panel and improves the aperture ratio of the pixel 101; There will be a serious color cast phenomenon, the problem of low pixel aperture ratio.
  • the first pixel electrode 203 and the second pixel electrode 207 have different potentials.
  • the three switching tubes 206 discharge the charge in the second pixel electrode 207 to the common electrode line Acom to adjust the voltage difference between the first pixel electrode 203 and the second pixel electrode 207, and the working state of the pixel 101 has good maneuverability ,
  • the aperture ratio of the pixel 101 is improved, the display panel can display a more complete and clear picture, and bring a good visual experience to the user.
  • the first conductive electrode of the first switch tube 204 is connected to the first pixel electrode 203, and the second conductive electrode of the first switch tube 204
  • the pass electrode is connected to the data line D, and the control electrode of the first switch tube 204 is connected to the scan line G.
  • the level state of the scan signal can control the on or off of the first switching tube 204; for example, when the scan signal is at the first level, the first The first conduction electrode and the second conduction electrode of the switch tube 204 will be electrically connected, and the charging operation of the first pixel electrode 203 can be realized by the data signal on the data line D, so the first pixel in the embodiment of the present application
  • the charging rate of the electrode 203 has excellent controllability.
  • the first conducting electrode of the second switching transistor 205 is connected to the second pixel electrode 207, and the second conducting electrode of the second switching transistor 205 is connected to the data line D,
  • the control electrode of the second switching transistor 205 is connected to the scanning line G, and the control electrode of the third switching transistor 206 is connected to the scanning line G.
  • the charging process of the first pixel electrode 203 can be controlled by the first switching tube 204, and the charging process of the second pixel electrode 207 can be controlled by the second switching tube 205.
  • the two pixel electrodes 207 exhibit different potentials, thereby changing the video driving state of the pixel 101.
  • the pixel driving circuit 10 has excellent maneuverability; meanwhile, in the second pixel area 202, the third switching tube 206 The first conduction electrode and the second conduction electrode are directly turned on, and the charge in the second pixel electrode 207 is sequentially output to the common electrode line Acom through the first conduction electrode and the second conduction electrode of the third switching tube 206, and The voltage difference between one pixel electrode 203 and the second pixel electrode 207 will also change with the on or off state of the third switch tube 206; therefore, the pixel driving circuit 10 in the embodiment of the present application uses a 3T design to Adjusting the voltage difference between the pixel electrodes in the pixel 101 saves the scanning driving cost of the pixel 10 in the display panel, the pixel driving circuit 10 has fewer electronic components, and improves the opening of the pixel 101 , Improving the color shift of the display panel screen.
  • the first switch tube 204 is a MOS tube or a transistor
  • the second switch tube 205 is a MOS tube or a transistor
  • the third switch tube 206 is a MOS tube or a transistor
  • the pixel driving circuit 10 has good compatibility and can be applied to different types of display panels; for example, the first switch tube 204 is a MOS tube, the second switch tube 205 is a MOS tube, and the third switch The tube 206 is a MOS tube, wherein the drain of the first switch tube 204 is connected to the data line D, the source of the first switch tube 204 is connected to the first pixel electrode 203, the gate of the first switch tube 204 is connected to the scan line G, and the second The drain of the switch 205 is connected to the data line D, the source of the second switch 205 is connected to the second pixel electrode 207, the gate of the second switch 205 is connected to the scan line G, and the drain of the third switch 206
  • the first switching tube 204 and the second switching tube 205 are connected to the same scanning line G, and the first switching tube 204 and the second switching tube 205 is connected to the same data line D, and then the first pixel electrode 203 and the second pixel electrode 207 have the same power control polarity, and the first switching transistor 204 and the second switching transistor 205 can be controlled to be turned on at the same time through the scan signal and the data signal Or it can be turned off at the same time to realize the charging process of the first pixel electrode 203 and the second pixel electrode 207, and the pixel 10 can be driven to a normal working state through one scanning signal and one data signal, which improves the scanning control of the pixel 101 in the display panel Efficiency, the control cost of the pixel 101 is lower; combining the first pixel electrode 203 and the second pixel electrode 207 can ensure that the pixel 101 is in a stable working state.
  • the first switch tube and the first switch tube of the previous pixel and the first switch tube and the first switch tube of the latter pixel are connected to the same data line D.
  • the same data line D can simultaneously control the on or off state of two pixels, which simplifies the circuit structure of the pixel driving circuit.
  • multiple pixels of the display panel have more The high scanning driving efficiency improves the pixel aperture ratio, and the pixel driving circuit has a wider application range, so that the display panel can present a clearer and complete picture.
  • the second switch tube 205 and the third switch tube 206 are connected to different scan lines G.
  • the control poles of the second switching tube 205 and the third switching tube 206 are respectively connected to different scan signals, and the second switching tube 205 and the third switching tube 206 have different power conducting electrodes
  • the second pixel electrode 207 can access the data signal through the second switching tube 205 to realize the charging process; and the second pixel electrode 207 transfers its own charge to the common electrode line Acom through the third switching tube 206;
  • the second switch tube 205 and the third switch tube 206 can realize the charging and discharging process of the second pixel electrode 207 to adjust the potential of the second pixel electrode 207; thereby adjusting the potential of the second pixel electrode 207 in real time according to the scan signal to make the pixels 101 is in a different working state; by adjusting the voltage difference between the pixel electrodes in the pixel 101, the color shift phenomenon of the display panel can be improved.
  • the first scan line Gn and the second scan line Gn + 1 have opposite power supply polarities; wherein, the first scan line Gn and the second scan line Gn
  • the switch tube 205 is connected, and the second scan line Gn + 1 is connected to the third switch tube 206.
  • the control electrode of the second switching transistor 205 is connected to the first scan line Gn
  • the control electrode of the third switching transistor 206 is connected to the second scan line.
  • the scan signal and the scan signal on the second scan line Gn + 1 have different power supply polarities
  • the second switch tube 205 and the third switch tube 206 have opposite conduction polarities; for example, when the second switch tube When 205 is turned on, the third switch 206 is turned off; when the second switch 205 is turned off, the third switch 206 is turned on; therefore, in the general pixel driving circuit 10 of the embodiment of the present application, the second pixel The electrode 207 can only be charged or discharged at any time to improve the maneuverability of the potential of the second pixel electrode 207.
  • the voltage difference between the first pixel electrode 203 and the second pixel electrode 207 can be controlled by the scan signal. The sequence changes to improve the quality of the picture in the display panel, and the pixel 101 can be in a stable and safe working state.
  • control electrode of the third switching transistor of the previous pixel and the control electrode of the third switching transistor of the following pixel are respectively connected to different scan lines G.
  • the scanning signal in the scanning line G can be used to control the on or off of the switch tube, and in each pixel, the charge of the second pixel region in the pixel can be transferred through the third switch tube To the common electrode line Acom; therefore, the on and off states of the previous pixel and the following pixel are controlled by different scanning lines G, and the voltage difference between different pixel regions in each pixel is adjusted accordingly under the drive of the scanning signal,
  • the light source coordination of different pixels in this embodiment is greatly improved, and the overall picture display of the display panel is better.
  • the pixel driving circuit has good controllability.
  • the first pixel area and the second pixel area have the same area.
  • the voltage difference between the first pixel area and the second pixel area will also be adjusted accordingly; therefore, in this embodiment, when the area of the first pixel area and the area of the second pixel area are equal, the first pixel area and the second
  • the difference in brightness and color of the light source between the pixel areas is smaller.
  • the voltage difference between the different pixel areas in each pixel has higher controllability. Each pixel can emit a more stable light source and improve the different pixels in the display panel. The color shift phenomenon between.
  • the pixel 101 adopts an N-domain design, where N is a positive integer greater than or equal to 1.
  • FIG. 3 shows a schematic diagram of the structure of the pixel 101 provided in the embodiment of the present application. Since each domain can be respectively connected to the corresponding scan signal and data signal, the scan signal and data signal Can control 8 domains in pixel 101; optionally, the first pixel area 201 contains 4 domains in 8 domains, and the second pixel area 202 contains 4 domains in 8 domains; pixel 101 combined with 8 domains can present different images / Video, the picture in the display panel has better operability.
  • the pixel driving circuit 10 can be applied to the pixels 101 of different domains, and the display panel can drive the domains in the pixel 101 in a corresponding working state according to the scan signal and the data signal, and pass through the second pixel area 202
  • the third switching transistor transfers the charge in the second pixel electrode 207 to the common electrode line Acom to adjust the voltage difference between the first pixel region 201 and the second pixel region 202 in the pixel 101, and multiple domains in the pixel 101 It can be in a stable working state, and the pixel 101 can emit light sources of various gradations, which improves the color shift phenomenon of multiple pixels 101 in the display panel, and the display angle of the display panel is better; therefore, the pixels in the embodiments of the present application
  • the driving circuit 10 has higher compatibility and wider application range, which can make the display panel present a clearer and complete picture, and improve the picture quality in the display panel.
  • any two pixels have the same number of domains.
  • each pixel has 8 domains or 9 domains, the display state of the light source between different pixels has a smaller difference, and the large viewing angle display of multiple pixels in the display panel The performance is more excellent; therefore, the pixel driving circuit in this embodiment has a wider application range, and the practical value is extremely high.
  • the first pixel area and the second pixel area have the same number of domain areas.
  • the first pixel region 201 has 4 domain regions
  • the second pixel region 202 has 4 domain regions; therefore, the pixels in this embodiment
  • the pixels can display a more complete and clear picture, the light source display quality of each pixel in the pixel drive circuit is improved, and the user can obtain a higher quality
  • the application range of the pixel drive circuit is wider.
  • the third switching tube 203 in the previous pixel 101 and the first switching tube 204 and the second switching tube in the latter pixel 101 205 is connected to the same scanning line G.
  • the control pole of the third switch 206 in the previous pixel 101, the control pole of the first switch 204 in the next pixel 101, and the control of the second switch 205 in the next pixel 101 The electrodes are connected to the same scanning line G, and the working status of the two pixels in the front and the back can be controlled by one scanning signal, and the potential of the pixel electrode in the adjacent pixel can be controlled by the scanning signal, which greatly reduces the number of embodiments in this application.
  • the scanning driving cost of each pixel; the pixel driving circuit 10 can pass a smaller number of scanning lines G, so that the pixel area in the pixel 101 can be in a stable working state, reducing the wiring cost of the scanning line G in the pixel driving circuit 10 In this way, the internal circuit structure of the pixel driving circuit 10 is simplified, and the display panel works by driving a plurality of pixel electrodes to present a better viewing effect at a large viewing angle, thereby improving the aperture ratio of the pixel 101.
  • two data lines D adjacent in the horizontal direction have opposite power supply polarities.
  • the corresponding data signal can be output to the first pixel area and the second pixel area in the pixel through the data line D to realize the charging process of the first pixel area and the second pixel area in the pixel; therefore
  • two pixels are driven by data signals of different power polarities to charge or discharge.
  • the pixel drive circuit combined with different pixels can present a more coordinated and consistent light-emitting effect.
  • the display panel Each pixel can be in the best working state.
  • the scan lines G and data lines D are evenly distributed in the pixel drive circuit. Through the scan lines G and data lines D, it is possible to change between different pixel areas in each pixel.
  • the voltage difference of the pixel improves the scanning driving efficiency of multiple pixels in the display panel; therefore, in the embodiment of the present application, by reasonably setting the spatial layout of the scanning line G and the data line D, the pixel driving circuit has a higher electronic element
  • the integration of the device improves the aperture ratio of the pixels in the display panel, and the display effect of the overall picture in the display panel is better.
  • FIG. 4 shows the structure of the pixel structure 40 provided by the embodiment of the present application.
  • the pixel structure 40 includes a pixel driving circuit 10 and an array substrate 401.
  • the pixel driving circuit 10 includes:
  • a plurality of pixels distributed in an array the pixels are defined by the intersection of the scanning line G and the data line D.
  • Each pixel includes a first pixel area 201 and a second pixel area 202 that are adjacently arranged in the horizontal direction.
  • the first pixel area 201 includes: a first switching tube 204 and a first pixel electrode 203, and the first pixel electrode 203 is connected to the data line D and the scanning line G through the first switching tube 204.
  • the second pixel area 202 includes: a second switching tube 205, a third switching tube 206, and a second pixel electrode 207, the second pixel electrode 207 is connected to the data line D and the scanning line G through the second switching tube 205, and the third switch
  • the first conductive electrode of the tube 206 is connected to the second pixel electrode 207
  • the control electrode of the third switch tube 206 is connected to the scan line G
  • the second conductive electrode of the third switch tube 206 is connected to the common electrode line Acom.
  • the third switch 206 When the third switch 206 is turned on, the charge in the second pixel electrode 207 is output to the common electrode line Acom through the third switch 206.
  • a plurality of pixels are arranged on the array substrate 401 and distributed in an array on the array substrate 401, and the common electrode lines are arranged opposite to the array substrate 401.
  • the second conductive electrode of the third switch tube 206 is electrically connected to the common electrode line Acom through the opening in the array substrate 401.
  • the second pixel electrode 207 in the pixel transfers its own charge to the common electrode line Acom through the third switching tube 206 to adjust the voltage difference between the pixel electrodes in the pixel;
  • the array substrate 401 itself has a certain thickness and width.
  • the array substrate 401 is perforated, and the second conductive electrode of the third switch tube 206 realizes the charge through the opening in the array substrate 401 and the common electrode line Acom Transmission; therefore, the array substrate 401 has a relatively simplified spatial structure, and the pixel driving circuit 10 can perform integrated wiring on the array substrate 401 to adjust the voltage difference of the pixel electrodes in the pixels, avoiding the color of the display panel when viewed at a large viewing angle Partial problem; the array substrate 401 in the embodiment of the present application has a higher degree of circuit integration and a higher pixel aperture ratio.
  • the pixel structure 40 can be compatible with different types of display panels, and the manufacturing cost and application cost are lower , With extremely high practical value; thus effectively solving the problem that the pixel structure in the display panel in the exemplary technology is more complicated and the pixel opening ratio is not high. Higher cost pigment scan driver, the display panel of a color cast serious problems occur when large viewing angle.
  • FIG. 5 shows the structure of a display device 50 provided by an embodiment of the present application.
  • the display device 50 includes a pixel structure 40 and a display panel 501; the pixel structure 40 is electrically connected to the display panel 501 through the pixel structure 40
  • the screen display effect in the display panel 501 can be changed in real time.
  • the pixel structure 40 includes a pixel driving circuit and an array substrate.
  • the pixel driving circuit includes:
  • a plurality of pixels distributed in an array are defined by the intersection of scan lines and data lines.
  • Each pixel includes a first pixel area and a second pixel area adjacent to each other in the horizontal direction.
  • the first pixel area includes: a first switch tube and a first pixel electrode, and the first pixel electrode is connected to the data line and the scan line through the first switch tube.
  • the second pixel area includes: a second switch tube, a third switch tube, and a second pixel electrode, the second pixel electrode is connected to the data line and the scan line through the second switch tube, and the first conductive electrode of the third switch tube is connected In the second pixel electrode, the control electrode of the third switch tube is connected to the scan line, and the second conductive electrode of the third switch tube is connected to the common electrode line.
  • the third switch When the third switch is turned on, the charge in the second pixel electrode is output to the common electrode line through the third switch.
  • a plurality of pixels are arranged on the array substrate and distributed in an array on the array substrate, and the common electrode line is arranged opposite to the array substrate.
  • the second conducting electrode of the third switch tube is electrically connected to the common electrode line through the opening in the array substrate.
  • the display panel 501 in the embodiments of the present application is: LCD (Liquid Crystal Display), OLED (Organic Electroluminescence Display), QLED (Quantum Dot Light Emitting Diodes, quantum dot light-emitting diodes) display panels, etc.
  • LCD Liquid Crystal Display
  • OLED Organic Electroluminescence Display
  • QLED Quantum Dot Light Emitting Diodes, quantum dot light-emitting diodes
  • the pixel driving circuit 10 in the embodiment of the present application can switch the pixel through the switch tube
  • the charge of the electrode is transferred to the common electrode line Acom, which improves the opening ratio of the pixel; the scanning driving cost of the pixel is lower, the circuit structure of the pixel driving circuit 10 is more simplified, and the low color temperature (Low color) shift design of the display device 50 is realized ,
  • the display device 50 has a better large viewing angle display effect under the driving of the scan signal and the data signal, and the picture quality of the display device 50 is higher; thus solving the problem that the display device in the exemplary technology may have serious color shift when viewed at a large viewing angle 1.
  • the pixel opening ratio is low, the pixel driving cost in the display panel is high, and the picture quality is poor.
  • the pixel driving circuit in this application uses a switch to transfer the charge in the pixel electrode to adjust the voltage difference between different pixel electrodes in the pixel.
  • the pixel can realize the corresponding image driving function, circuit structure, and manufacturing cost And application costs are relatively low, improve the pixel aperture ratio, avoid the color shift problem of the display panel when viewed at a large angle, and have strong compatibility; therefore, the pixel driver circuit in this application is for improving the image quality of the display panel in the field It is extremely important and has a wide range of industrial production value.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

L'invention concerne un circuit d'attaque de pixels (10), un procédé d'attaque de pixel et un appareil d'affichage. Le circuit d'attaque de pixel (10) comprend : une ligne d'électrode commune (Acom) et de multiples pixels (101) distribués dans un réseau, chacun des pixels (101) comprenant une première zone de pixel (201) et une seconde zone de pixel (202) disposées adjacentes l'une à l'autre dans la direction horizontale ; la première zone de pixel (201) comprend un premier tube de commutation (204) et une première électrode de pixel (203) ; la deuxième zone de pixel (202) comprend un deuxième tube de commutation (205), un troisième tube de commutation (206) et une seconde électrode de pixel (207) ; et lorsque le troisième tube de commutation (206) est allumé, des charges dans la seconde électrode de pixel (207) sont émises à la ligne d'électrode commune (Acom) au moyen du troisième tube de commutation (206).
PCT/CN2018/120816 2018-11-09 2018-12-13 Circuit de commande de pixels, structure de pixels et appareil d'affichage WO2020093518A1 (fr)

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CN201821853852.5 2018-11-09
CN201821853852.5U CN208888524U (zh) 2018-11-09 2018-11-09 画素驱动电路、画素结构及显示面板

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CN110444142B (zh) * 2019-07-26 2024-04-12 福建华佳彩有限公司 一种画素排列结构和面板
CN115047682A (zh) * 2022-07-07 2022-09-13 惠科股份有限公司 画素结构、显示面板以及电子设备

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